Operating instructions

Boiler
model
Minimum
foundation
length
Minimum
foundation
width
GWA-052 25” 12”
GWA-070 25” 12”
GWA-105 25” 15”
GWA-140 25” 18”
GWA-175 25” 21”
GWA-210 25” 24”
GWA-245 25” 27”
3
Part Number 550-142-784/0812
GWA Series 2 Gas-Fired Water Boilers – Boiler Manual
Service clearances
1. Provideminimumclearancesforcleaningandservicingthe
boilerandforaccesstocontrolsandcomponentsaslistedin
the table below:
2. Provideatleastscrewdriverclearancetojacketfrontpanel
screwsforremoval of front panel for inspection and minor
service.Ifunabletoprovideatleastscrewdriverclearance,
installunionsandshutoffvalvesinsystemsoboilercanbe
movedforservicing.
Figure 1 Minimum clearances
Clearances
Flooring and foundation
Flooring
TheGWAboilerisapprovedforinstallationoncombustibleoor-
ing, but must never be installed on carpeting.
 Donotinstallboileroncarpetingeveniffoundation
is used. Fire can result, causing severe personal
injury, death or substantial property damage.
Foundation
1. Provide a solid brick or minimum 2-inch thick concrete
foundationpadifanyofthefollowingistrue:
• oorcanbecomeooded.
• theboilermountingareaisnotlevel.
2. See Table 1forminimumfoundationdimensions.
Residential garage installation
Takethefollowingspecialprecautionswheninstallingtheboilerin
aresidentialgarage.Iftheboilerislocatedinaresidentialgarage,
perANSIZ223.1,paragraph5.1.9:
• Mounttheboileraminimumof18inchesabovetheoorof
the garage to assure the burner and ignition devices will be
no less than 18 inches above the floor.
• Locateor protect the boilersoit cannot bedamagedbya
moving vehicle.
Minimum clearance to combustible materials
1. Hotwaterpipesmustbeatleast½”fromcombustiblematerial.
2. Single-wallvent pipe must be at least 6 inches from
combustible material.
3. TypeBdouble-wallmetalventpipe—Seeventmanufacturer’s
recommendationforclearancestocombustiblematerial.
Small space installations
1. When the boiler is located in a closet or small space, provide
clearances no less than those shown in Figure 1. The
clearancesarerequiredtoanysurface,whethercombustible
or non-combustible.
Table 1 Minimum foundation size
1 Prepare boiler location continued
Clearances from combustible materials: Minimum
Front (provide means of access)
3"
Back
7"
Left side (provide means of access)
6"
Right side
2"
Top
GWA-052 to GWA-105
GWA-140
GWA-175
GWA-210
GWA-245
H
35”
35½”
38½”
39¾”
42½”
Service clearances:
Minimum
Top (for cleaning ueways)
35"
Front (for access to controls and components)
18"
Back
7"
Left side (for cleaning and servicing)
24"
Right side
7"